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25 to > 80 psi Impact pressure of a fist punch (approximate) [citation needed] [56] +180 to +250 kPa +26 to +36 psi Air pressure in an automobile tire relative to atmosphere (gauge pressure) [citation needed] +210 to +900 kPa +30 to +130 psi Air pressure in a bicycle tire relative to atmosphere (gauge pressure) [57] 300 kPa 50 psi
If a tire is inflated to 4 bar (400 kPa; 58 psi) at sea level, the absolute internal pressure would be 5 bar (500 kPa; 73 psi) (+25%), and this is the pressure that the tire would need to contain if it were moved to a location with no atmospheric pressure, such as the vacuum of free space. At the highest elevation of commercial air travel ...
[citation needed] In terms of gearing, bikes can feature derailleurs or hub gears, or both or none. For 2013 Dahon offers 30 models of folding or portable bicycles in wheel sizes ranging from 16-26” with aluminum alloy or steel frames. [20] One of the company's best selling bikes is the Boardwalk, an entry-level, steel-frame commuter bike. [21]
A 2001 NHTSA study found that 40% of passenger cars have at least one tire under-inflated by 0.4 bars (6 psi) or more. [1] The number one cause of tire failure was determined to be under-inflation. Drivers are encouraged to make sure their tires are adequately inflated at all times.
ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear.
David T. Hon (born 1941) is a Guangdong-born [1] Taiwanese physicist, inventor and entrepreneur. He is best known as the inventor and founder of Dahon folding bicycles.Dahon has since grown to become the world's largest manufacturer and marketer of folding bikes [2] [3] with Hon still CEO to this day.
Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [24] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.
Basket: it is an optional attachment on a bike and is used for carrying things; Bearing: a device that facilitates rotation by reducing friction; Bell: an audible device for warning pedestrians and other cyclists; Belt-drive: alternative to chain-drive; Bicycle brake cable: see Cable; Bottle cage: a holder for a water bottle